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水热法合成氮磷共掺杂碳点作为镉（II）的荧光探针。

Hydrothermal synthesis of carbon dots codoped with nitrogen and phosphorus as a turn-on fluorescent probe for cadmium(II).

机构信息

Department of Applied Chemistry, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.

Department of Bioinformatics, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.

出版信息

Mikrochim Acta. 2019 Feb 2;186(3):147. doi: 10.1007/s00604-019-3264-5.

DOI:10.1007/s00604-019-3264-5
PMID:30712175
Abstract

Nitrogen and phosphorus co-doped carbon dots (N,P-CDs) have been synthesized via hydrothermal method starting from o-phosphorylethanolamine and citric acid. The blue-green fluorescence of the N,P-CDs (with excitation/emission peaks at 325/435 nm) is gradually enhanced on sequential addition of Cd(II) ions. This fluorometric assay works in the 0.5 μM to 12.5 μM Cd(II) concentration range and has a 0.16 μM detection limit. The phenomenon may be attributed to chelation enhanced fluorescence that is induced by the formation of Cd(II)-N,P-CDs complex with functional groups present on the surface. The method has applied to the detection of Cd(II) in spiked serum and urine samples and gave satisfying results. Graphical abstract Schematic presentation of the synthesis of nitrogen and phosphorus co-doped carbon dots (N,P-CDs) and their application as a turn-on fluorescence probe for Cd(II) detection.

摘要

氮磷共掺杂碳点（N，P-CDs）通过水热法从邻膦酰基乙醇胺和柠檬酸合成。N，P-CDs 的蓝绿光荧光（激发/发射峰在 325/435nm）随着 Cd(II)离子的顺序加入逐渐增强。该荧光测定法在 0.5μM 至 12.5μM Cd(II)浓度范围内有效，检测限为 0.16μM。这种现象可能归因于螯合增强荧光，这是由表面存在的官能团形成的 Cd(II)-N，P-CDs 配合物引起的。该方法已应用于加标血清和尿液样品中 Cd(II)的检测，并取得了满意的结果。 图表摘要 氮磷共掺杂碳点（N，P-CDs）的合成示意图及其作为 Cd(II)检测的开启荧光探针的应用。

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